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对气固流化床内压力脉动时间序列进行分析，研究了流化床内的混沌特性，分别利用李雅普诺夫指数、相对分散度、分形维数和混沌度来定量描述稳定性、复杂性、自由度和系统状态数。证明四个混沌特征参数的相关性是好的，得到了混沌特性随着气速和床层高度的变化趋势，并且提出气泡行为是流化床内产生混沌运动的重要原因。
The time series of pressure pulsation in gas-solid fluidized bed is analyzed, and the chaotic characteristics in the fluidized bed are studied. By using Lyapunov exponents, relative dispersity, fractal dimension and chaos, the stability, complexity, Degree of freedom and number of system states. It is proved that the correlation between the four chaotic characteristic parameters is good. The trend of chaos characteristic with the variation of gas velocity and bed height is obtained, and the bubble behavior is proposed as an important reason for the chaotic motion in the fluidized bed.